Coupling Fe and Mo single atoms on hierarchical N-doped carbon nanotubes enhances electrochemical nitrogen reduction reaction performance

Recent Developments of Dual Single‐Atom Catalysts for Nitrogen Reduction Reaction

“…Cui et al performed time-dependent in situ FTIR measurements for the NRR process to explore the synergy mechanism of Mo and Fe single atoms. [21] As shown in Figure 6e, for dimer FeMo/NC, the NÀ N stretching, -NH 2 wagging, and HÀ NÀ H bending were observed at about 1130, 1250, and 1430 cm À 1 , respectively, which imply the formation of *N 2 H y intermediates during NRR process. The amount and intensity of key intermediates are higher compared to the single-atom contrasts in Figure 6e, which indicates that the FeMo/NC DSACS surface is more conducive to forming the intermediates.…”

“…While the majority of metal atoms remain isolated, DSACs exhibit significant advantages in catalysis due to synergistic effects, surpassing those observed in SACs. Cui et al achieved the construction of a high-performance catalyst through the anchoring of isolated Fe and Mo atoms onto N-doped carbon nanotubes (FeMo/NC) with an enhanced NH 3 yield rate of 26.8 μg h À 1 mg. [21] They found that the NH 3 yield rate of FeMo dual single-atom was 2.5 and 1.6 times higher than those of single-atom Fe and Mo catalysts, respectively. Zhang et al elucidated the factors contributing to the enhanced NRR activity of Fe SACs when adjacent transition metal (TM) single-atoms were anchored onto C 2 N sheets, employing first-principles calculations.…”

“…[48] Therefore, the search for suitable metal-free materials as catalyst supports holds significant importance. Several carbon-based materials have gained popularity in the field of electrocatalysis, including graphene, [49] graphdiyne, [50] N-doped graphene, N-doped C tube, [21] graphitic carbon nitride (g-C 3 N 4 [51] and g-C 6 N 6 [32] ), C 2 N [50] and PC 6 monolayer [52] as shown in Figure 2b. These materials exhibit promising properties for NRR.…”

The journey of iron-based electrocatalytic materials for nitrogen reduction reaction: from current status to future prospects

“…229,230 Zhang and coworkers reported FeMo/NC DSACs as a “dual-site” material by anchoring isolated Fe and Mo atoms on hierarchical N-doped carbon nanotubes. 231 This catalyst demonstrated an NH 3 yield of 26.8 μg h −1 mg cat −1 and a FE of 11.8, which is 1.6 and 2.5 times larger than those of Mo/NC and Fe/NC. Time-dependent in situ Fourier transform infrared spectroscopy ( in situ FTIR) measurements were conducted for dual-site FeMo/NC DSACs and single-site Fe/NC and Mo/NC to investigate the synergy mechanism of Mo and Fe single atoms (Fig.…”

“…229,230 Zhang and coworkers reported FeMo/NC DSACs as a "dual-site" material by anchoring isolated Fe and Mo atoms on hierarchical N-doped carbon nanotubes 231. This catalyst demonstrated an NH3 yield of 26.8 mg h −1 mg cat −1 and a FE of 11.8, which is 1.6 and 2.5 times larger than those of Mo/NC and Fe/NC.…”